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A p-n junction is fabricated from a semi...

A p-n junction is fabricated from a semiconductor with band gap of `2.8eV`. Can it detect a wavelength of `6000nm`?

Text Solution

Verified by Experts

We use ,
` E_g = (hc)/ lambda rArr E_g = (1240 eV .nm) /( 600 nm) `
`~~ 2 eV `
So, photon energy is less than that required `(2.8 eV)`. So , detector is not able to detect this wavelength .
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